US20160209104A1 - Refrigerator - Google Patents
Refrigerator Download PDFInfo
- Publication number
- US20160209104A1 US20160209104A1 US14/914,997 US201414914997A US2016209104A1 US 20160209104 A1 US20160209104 A1 US 20160209104A1 US 201414914997 A US201414914997 A US 201414914997A US 2016209104 A1 US2016209104 A1 US 2016209104A1
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- US
- United States
- Prior art keywords
- carbon dioxide
- pressure
- valve
- refrigerator
- relief
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 454
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 227
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 227
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 148
- 230000007257 malfunction Effects 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 claims description 8
- 238000005192 partition Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000008878 coupling Effects 0.000 description 19
- 238000010168 coupling process Methods 0.000 description 19
- 238000005859 coupling reaction Methods 0.000 description 19
- 230000002093 peripheral effect Effects 0.000 description 8
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000004308 accommodation Effects 0.000 description 4
- 239000008213 purified water Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
- F25D23/126—Water cooler
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
- A23L2/02—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation containing fruit or vegetable juices
- A23L2/04—Extraction of juices
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
- A23L2/38—Other non-alcoholic beverages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/2319—Methods of introducing gases into liquid media
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/236—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids specially adapted for aerating or carbonating beverages
- B01F23/2362—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids specially adapted for aerating or carbonating beverages for aerating or carbonating within receptacles or tanks, e.g. distribution machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/236—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids specially adapted for aerating or carbonating beverages
- B01F23/2363—Mixing systems, i.e. flow charts or diagrams; Arrangements, e.g. comprising controlling means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/236—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids specially adapted for aerating or carbonating beverages
- B01F23/2364—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids specially adapted for aerating or carbonating beverages using security elements, e.g. valves, for relieving overpressure
-
- B01F3/04439—
-
- B01F3/04808—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D1/00—Apparatus or devices for dispensing beverages on draught
- B67D1/0042—Details of specific parts of the dispensers
- B67D1/0057—Carbonators
- B67D1/0061—Carbonators with cooling means
- B67D1/0062—Carbonators with cooling means inside the carbonator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
Definitions
- the present invention relates to a refrigerator having a carbonated water generating module.
- refrigerators are devices which include storage chambers which store food and cold air supply units which supply cold air to the storage chambers, and thus maintain the freshness of the stored food.
- the refrigerators may include ice-making devices which make ice, and dispensers from which users extract water or the ice from the outside without opening doors to meet the requirement of the users, and furthermore, may also include carbonated water production devices which generate carbonated water.
- the carbonated water production device includes a carbon dioxide cylinder in which a high pressure carbon dioxide gas is stored, and a carbonated water tank in which carbonated water is produced by mixing carbon dioxide and water.
- the carbonated water production device includes a pressure regulator which adjusts a pressure of the carbon dioxide discharged from the carbon dioxide cylinder, and a solenoid switch valve which regulates supplying of the carbon dioxide discharged from the pressure regulator to the carbonated water tank.
- the pressure regulator adjusts the pressure thereof to about 8.5 bar for discharging the carbon dioxide. This is a suitable pressure for mixing the carbon dioxide and water in the carbonated water tank.
- the carbon dioxide may be heated by external heat and a pressure thereof can increase.
- the carbon dioxide cylinder is a consumable component, when the carbon dioxide is all exhausted, the carbon dioxide cylinder should be replaced.
- the present invention is directed to providing a refrigerator including a carbonated water production device which prevents a malfunction of a solenoid switch valve among a pressure regulator which adjusts a pressure of carbon dioxide charged in a carbon dioxide cylinder and discharges the carbon dioxide, and the solenoid switch valve which regulates supplying of the carbon dioxide discharged from the pressure regulator to a carbonated water tank even when the pressure of the carbon dioxide increases, and has a system having improved reliability and safety.
- the present invention is also directed to providing a refrigerator including a notifier which senses when carbon dioxide charged in a carbon dioxide cylinder is consumed and when a replacement of the carbon dioxide cylinder is needed, and displays the replacement of the carbon dioxide cylinder to the outside.
- One aspect of the present invention provides a refrigerator including: a main body; a carbonated water tank in which carbon dioxide and water are mixed to produce carbonated water; a carbon dioxide cylinder in which carbon dioxide is charged; a pressure regulator which adjusts a pressure of carbon dioxide discharged from the carbon dioxide cylinder and discharges the carbon dioxide; a solenoid switch valve which regulates supplying of the carbon dioxide discharged from the pressure regulator to the carbonated water tank; a connection channel which connects the pressure regulator and the solenoid switch valve; and a relief valve which is provided in the connection channel to discharge carbon dioxide in the connection channel to the atmosphere when a pressure of the carbon dioxide in the connection channel is greater than a predetermined pressure limit.
- a pressure of carbon dioxide which flows into the solenoid switch valve may be maintained equal to or less than the predetermined pressure limit by operating the relief valve, and a malfunction of the solenoid switch valve due to a high pressure may be prevented.
- the predetermined pressure limit may be determined to be in the range of 9.5 to 11.5 bar.
- the relief valve may include: a first relief valve body; a second relief valve body coupled to the first relief valve body; a relief main channel which is formed in the first relief valve body and having both ends each in communication with the connection channel; a relief discharge channel which is formed in the second relief valve body, has one end which communicates with the relief main channel, and the other end having an opening facing the outside; a relief switch member which moves forward or backward due to a pressure of carbon dioxide in the relief main channel and opens or closes the relief discharge channel; and a relief elastic member which elastically supports the relief switch member.
- the relief switch member When a pressure of carbon dioxide in the connection channel is greater than the predetermined pressure limit, the relief switch member may move in one direction and open the relief discharge channel, and when a pressure of the carbon dioxide in the connection channel is less than the predetermined pressure limit, the relief switch member may move in a direction opposite the one direction, and close the relief discharge channel.
- a refrigerator including: a main body; a storage chamber provided in the main body; a door which opens or closes the storage chamber; a carbonated water tank in which carbon dioxide and water are mixed to produce carbonated water; a carbon dioxide cylinder in which carbon dioxide is charged; a pressure regulator which adjusts a pressure of carbon dioxide discharged from the carbon dioxide cylinder and discharges the carbon dioxide; a solenoid switch valve which regulates supplying of the carbon dioxide discharged from the pressure regulator to the carbonated water tank; a connection channel which connects the pressure regulator and the solenoid switch valve; a notifier which notifies of a replacement time of the carbon dioxide cylinder; a low pressure sensor integrated relief valve which sends a low pressure signal when a pressure of carbon dioxide in the connection channel is less than a predetermined replacement pressure, and discharges the carbon dioxide in the connection channel when a pressure of the carbon dioxide in the connection channel is greater than a predetermined pressure limit; and a controller which receives the low pressure signal sent from the low pressure sensor integrated relief valve
- the notifier may include a display unit provided on the door.
- a pressure of carbon dioxide which flows into the solenoid switch valve may be maintained equal to or less than the predetermined pressure limit by operating the low pressure sensor integrated relief valve, and a malfunction of the solenoid switch valve due to a high pressure may be prevented.
- the predetermined replacement pressure may be determined to be in the range of 7.3 to 7.7 bar.
- the predetermined pressure limit may be determined to be in the range of 9.5 to 11.5 bar.
- the low pressure sensor integrated relief valve m installed at an inlet of the solenoid switch valve.
- the low pressure sensor integrated relief valve may include: a valve body; a valve main channel which is formed in the valve body and has both ends in communication with the connection channel; a diaphragm installed in the valve body; a partition space partitioned from the valve main channel by the diaphragm; a pusher which moves forward or backward due to a pressure of carbon dioxide in the valve main channel; a micro switch which is pressed by the pusher and is turned on or off; and a pusher elastic member which elastically supports the pusher.
- the pusher When a pressure of carbon dioxide in the connection channel is less than the replacement pressure, the pusher may move in one direction, be separated from the micro switch, and turn on the micro switch, and when a pressure of the carbon dioxide in the connection channel is greater than the replacement pressure, the pusher may move in a direction opposite the one direction, press the micro switch, and turn off the micro switch.
- the micro switch When the micro switch is turned on, the micro switch may send a low pressure signal to the controller.
- the low pressure sensor integrated relief valve may include: a valve body; a valve main channel which is formed in the valve body and has both ends in communication with the connection channel; a valve discharge channel which is formed in the valve body, has one end in communication with the valve main channel, and the other end having an opening facing the outside; a valve switch member which moves forward or backward due to a pressure of carbon dioxide in the valve main channel and opens or closes the valve discharge channel; and a valve elastic member which elastically supports the valve switch member.
- valve switch member When a pressure of carbon dioxide in the connection channel is greater than the predetermined pressure limit, the valve switch member may move in one direction and open the valve discharge channel, and when a pressure of the carbon dioxide in the connection channel is less than the predetermined pressure limit, the switching member may move in another direction and close the valve discharge channel.
- Still another aspect of the present invention provides a method of controlling a refrigerator which includes a carbonated water tank in which carbon dioxide and water are mixed to produce carbonated water, a carbon dioxide cylinder in which carbon dioxide is charged, a pressure regulator which adjusts a pressure of carbon dioxide discharged from the carbon dioxide cylinder and discharges the carbon dioxide, a solenoid switch valve which regulates supplying of the carbon dioxide discharged from the pressure regulator to the carbonated water tank, a connection channel which connects the pressure regulator and the solenoid switch valve, a notifier which notifies of a replacement time of the carbon dioxide cylinder, and a low pressure sensor integrated relief valve provided in the connection channel, the method including: sensing a pressure of carbon dioxide in the connection channel by the low pressure sensor integrated relief valve; displaying a replacement time by the notifier when the sensed pressure is less than a predetermined replacement pressure; and discharging the carbon dioxide in the connection channel to the atmosphere by the low pressure sensor integrated relief valve when the sensed pressure is greater than a predetermined pressure limit.
- a relief valve disposed between a pressure regulator and a carbon dioxide switching valve reduces a pressure of carbon dioxide by discharging the carbon dioxide to the atmosphere between the pressure regulator which adjusts the pressure of the carbon dioxide discharged from a carbon dioxide cylinder and discharges the carbon dioxide and a solenoid switch valve which regulates supplying of the carbon dioxide to a carbonated water tank, thereby the relief valve can prevent a malfunction of a solenoid switch valve due to a high pressure. Accordingly, the reliability and safety of the carbonated water making system can be improved.
- a low pressure sensor which senses a low pressure of carbon dioxide is provided in the relief valve, when carbon dioxide has a pressure equal to or less than a predetermined replacement pressure, the low pressure sensor transmits a signal to a notifier, and thus the notifier can easily recognize that the replacement time of the carbon dioxide cylinder is close.
- the relief valve and the low pressure sensor are integrally formed, components are simplified and the space utilization can be improved when compared to a case in which the relief valve and the low pressure sensor are provided separately.
- FIG. 1 is a perspective view illustrating an exterior of a refrigerator according to one embodiment of the present invention.
- FIG. 2 is a perspective view illustrating an inside of the refrigerator of FIG. 1 .
- FIG. 3 is an exploded perspective view illustrating an assembly structure of a carbonated water generating module of the refrigerator of FIG. 1 .
- FIG. 4 is a perspective view when a cover of the carbonated water generating module of the refrigerator of FIG. 1 is separated therefrom.
- FIG. 5 is an exploded perspective view illustrating a pressure regulator of the refrigerator of FIG. 1 and a peripheral structure thereof.
- FIG. 6 is a cross-sectional view illustrating the pressure regulator of the refrigerator of FIG. 1 and the peripheral structure thereof.
- FIG. 7 is a perspective view illustrating a relief valve of the refrigerator of FIG. 1 and a peripheral structure thereof.
- FIG. 8 is a cross-sectional view illustrating a structure of the relief valve of the refrigerator of FIG. 1 when the relief valve is closed.
- FIG. 9 is a cross-sectional view illustrating a structure of the relief valve of the refrigerator of FIG. 1 when the relief valve is open.
- FIG. 10 is a circuit diagram for describing a process of generating and discharging carbonated water in the refrigerator of FIG. 1 .
- FIG. 11 is a perspective view illustrating a low pressure sensor integrated relief valve of a refrigerator according to another embodiment of the present invention and a peripheral structure thereof.
- FIG. 12 is a view illustrating a coupling relationship of the low pressure sensor integrated relief valve of the refrigerator of FIG. 11 .
- FIG. 13 is an exploded perspective view illustrating a structure of the low pressure sensor integrated relief valve of the refrigerator of FIG. 11 .
- FIG. 14 is a cross-sectional view illustrating the low pressure sensor integrated relief valve of the refrigerator of FIG. 11 when a valve discharge channel is closed and a micro switch is turned off.
- FIG. 15 is a cross-sectional view illustrating the low pressure sensor integrated relief valve of the refrigerator of FIG. 11 when the valve discharge channel is open and the micro switch is turned off.
- FIG. 16 is a cross-sectional view illustrating the low pressure sensor integrated relief valve of the refrigerator of FIG. 11 when the valve discharge channel is closed and the micro switch is turned on.
- FIG. 17 is a circuit diagram for describing a process of generating and discharging carbonated water in the refrigerator of FIG. 11 .
- FIG. 18 is a view illustrating a replacement notifier of a carbon dioxide cylinder of the refrigerator of FIG. 11 .
- FIG. 19 is a control block diagram of the refrigerator of FIG. 11 .
- FIG. 1 is a perspective view illustrating an exterior of a refrigerator according to one embodiment of the present invention
- FIG. 2 is a perspective view illustrating an inside of the refrigerator of FIG. 1 .
- the refrigerator 1 may include a main body 10 , storage chambers 20 and 30 formed in the main body 10 , and a cold air supply unit (not shown) which supplies cold air to the storage chambers 20 and 30 .
- the main body 10 may include inner boxes forming the storage chambers 20 and 30 , an outer box which is coupled to outer sides of the inner boxes and forms an exterior of the refrigerator, and an insulation material which is disposed between the inner boxes and the outer box and insulates the storage chambers 20 and 30 .
- the storage chambers 20 and 30 may be partitioned into a refrigerator compartment 20 positioned at an upper portion and a freezer compartment 30 positioned at a lower portion by an intermediate partition 11 .
- Shelves 23 on which food may be placed, and at least one storage box 27 which keeps food in a sealed state may be provided in the refrigerator compartment 20 .
- an ice-making chamber 81 capable of generating ice may be formed at an upper corner of the refrigerator compartment 20 .
- the ice-making chamber 81 may be insulated and partitioned from the refrigerator compartment 20 by an ice-making chamber case 82 .
- An ice-making device 80 such as an ice-making tray and an ice bucket which stores the ice generated in the ice-making tray may be provided in the ice-making chamber 81 .
- a water tank 70 capable of storing water may be provided in the refrigerator compartment 20 .
- the water tank 70 may be provided between a plurality of storage boxes 27 , but is not limited thereto.
- the water tank 70 may be provided in the refrigerator compartment 20 so that water in the water tank 70 is cooled due to cold air in the refrigerator compartment 20 .
- the water tank 70 may be connected to an external water source 40 (see FIG. 10 ) such as tap water, and may store water purified by a water purifying filter 50 (see FIG. 10 ).
- a channel switching valve 60 may be provided in a water supply pipe which connects the external water source 40 and the water tank 70 , the channel switching valve 60 may selectively supply water supplied by the external water source 40 to the water tank 70 or the ice-making device 80 .
- Each of the refrigerator compartment 20 and the freezer compartment 30 has an open front through which food is introduced or withdrawn, the open front of the refrigerator compartment 20 may be opened or closed by a pair of rotational doors 21 and 22 hinge-coupled to the main body 10 , and the open front of the freezer compartment 30 may be opened or closed by a sliding door 31 which is movable by sliding with respect to the main body 10 .
- a door guard 24 which may store food may be provided on the rear surface of the refrigerator compartment doors 21 and 22 .
- gaskets 28 which seal between the refrigerator compartment doors 21 and 22 and the main body 10 to keep cold air of the refrigerator compartment 20 when the refrigerator compartment doors 21 and 22 are closed may be provided at edges of the rear surfaces of the refrigerator compartment doors 21 and 22 .
- a rotational bar 26 which seals between the refrigerator compartment door 21 and the refrigerator compartment door 22 to keep the cold air of the refrigerator compartment 20 when the refrigerator compartment doors 21 and 22 are closed may be provided at any one refrigerator compartment door of the refrigerator compartment doors 21 and 22 .
- a dispenser 90 which may extract water or ice from the outside without opening the refrigerator compartment door 21 may be provided in any one refrigerator compartment door of the refrigerator compartment doors 21 and 22 .
- the dispenser 90 may include a water-intake space 91 into which a container, such as a cup, is inserted and through which water or ice may be withdrawn, a control panel 92 in which input buttons through which various settings of the dispenser 90 are input and a display which displays various types of information of the dispenser 90 are provided, and an operation lever 93 which may operate the dispenser 90 to discharge water or ice.
- the dispenser 90 may include an ice guide channel 94 which connects the ice-making device 80 and the water-intake space 91 to discharge ice generated by the ice-making device 80 to the water-intake space 91 .
- a carbonated water generating module 100 which generates carbonated water may be installed at a rear surface of the refrigerator compartment door 21 in which the dispenser 90 of the refrigerator 1 according to one embodiment of the present invention is provided.
- the carbonated water generating module 100 will be described in detail below.
- FIG. 3 is an exploded perspective view illustrating an assembly structure of a carbonated water generating module of the refrigerator of FIG. 1
- FIG. 4 is a perspective view when a cover of the carbonated water generating module of the refrigerator of FIG. 1 is separated therefrom
- FIG. 5 is an exploded perspective view illustrating a pressure regulator of the refrigerator of FIG. 1 and a peripheral structure thereof
- FIG. 6 is a cross-sectional view illustrating the pressure regulator of the refrigerator of FIG. 1 and the peripheral structure thereof
- FIG. 7 is a perspective view illustrating a relief valve of the refrigerator of FIG. 1 and a peripheral structure thereof
- FIG. 8 is a cross-sectional view illustrating a structure of the relief valve of the refrigerator of FIG. 1 when the relief valve is closed
- FIG. 8 is a cross-sectional view illustrating a structure of the relief valve of the refrigerator of FIG. 1 when the relief valve is closed
- FIG. 9 is a cross-sectional view illustrating a structure of the relief valve of the refrigerator of FIG. 1 when the relief valve is open
- FIG. 10 is a circuit diagram for describing a process of generating and discharging carbonated water in the refrigerator of FIG. 1 .
- the carbonated water generating module 100 for generating carbonated water in the refrigerator 1 may include a carbon dioxide cylinder 120 in which high pressure carbon dioxide is charged, a carbonated water tank 110 in which water and carbon dioxide are mixed to produce carbonated water, a module case 140 which has accommodation spaces 151 , 152 , and 153 which accommodate the carbon dioxide cylinder 120 and the carbonated water tank 110 and is coupled to the rear surface of the refrigerator compartment door 21 , and an integrated valve assembly 130 .
- the high pressure carbon dioxide in the range of about 45 to 60 bar may be charged in the carbon dioxide cylinder 120 .
- the carbon dioxide cylinder 120 may be installed in a cylinder connector 157 of the module case 140 , and may be accommodated in a lower accommodation space 153 of the module case 140 .
- a carbon dioxide gas in the carbon dioxide cylinder 120 may be supplied to the carbonated water tank 110 through a carbon dioxide supply channel 200 which connects the carbon dioxide cylinder 120 and the carbonated water tank 110 .
- a pressure regulator 201 which adjusts a pressure of a carbon dioxide gas, a solenoid switch valve 202 which opens or closes the carbon dioxide supply channel 200 , and a carbon dioxide gas backflow prevention valve 203 which prevents backflow of a carbon dioxide gas may be provided in the carbon dioxide supply channel 200 .
- the pressure regulator 201 may decrease a pressure of a carbon dioxide gas discharged from the carbon dioxide cylinder 120 to about 8.5 bar to discharge the carbon dioxide gas.
- Carbonated water is generated by mixing carbon dioxide supplied by the carbon dioxide cylinder 120 and purified water supplied by the water tank 70 in the carbonated water tank 110 which may store the generated carbonated water.
- the carbonated water tank 110 may be connected with a water supply channel 210 to which water is supplied from the water tank 70 , a carbonated water discharge channel 230 which discharges the generated carbonated water to the water-intake space 91 , an exhaust channel 250 which discharges residual carbon dioxide gas in the carbonated water tank 110 before supplying water to the carbonated water tank 110 , as well as the above-described carbon dioxide supply channel 200 .
- a water supply solenoid valve 211 which opens or closes a water supply channel 210 may be provided in the water supply channel 210 .
- a carbonated water discharge solenoid valve 231 which opens or closes the carbonated water discharge channel 230 , and a carbonated water regulator 232 which adjusts a pressure of discharged carbonated water may be provided in the carbonated water discharge channel 230 .
- An exhaust valve 251 which opens or closes the exhaust channel 250 may be provided in the exhaust channel 250 .
- a water level sensor 111 capable of measuring an amount of water supplied to the carbonated water tank 110
- a temperature sensor 112 capable of measuring a temperature of water supplied to the carbonated water tank 110 or a temperature of carbonated water generated by the carbonated water tank 110 may be provided in the carbonated water tank 110 .
- a tank safety valve 114 which may discharge a high pressure carbon dioxide gas when the high pressure carbon dioxide gas having a pressure more than a predetermined pressure is supplied to the carbonated water tank 110 due to a malfunction of the pressure regulator 201 and the like, may be provided in the carbonated water tank 110 .
- the above-described carbonated water tank 110 may be formed to have a predetermined size, and may be formed to accommodate about 1 l of purified water.
- the carbonated water tank 110 may be formed of a stainless material to minimize a space occupied thereby, withstand high pressure, and have corrosion resistance.
- the carbonated water tank 110 may be accommodated in a first upper accommodation space 151 of the module case 140 .
- the carbonated water tank 110 may be supported by a bottom support portion 155 of the module case 140 and a guide portion 156 .
- the integrated valve assembly 130 may be formed with the above-described water supply solenoid valve 211 , the carbonated water discharge solenoid valve 231 , and a water discharge solenoid valve 221 .
- the water supply solenoid valve 211 , the carbonated water discharge solenoid valve 231 , and the water discharge solenoid valve 221 may be integrally formed as one unit.
- the above-described integrated valve assembly 130 may be accommodated in a second upper accommodation space 152 of the module case 140 .
- the module case 140 may include a back case 150 having one open side, and a cover 160 coupled to the one open side of the back case 150 .
- At least one insertion groove 154 may be formed at a position corresponding to at least one insertion protrusion 25 formed on the rear surface of the refrigerator compartment door 21 , in the module case 140 . Accordingly, as the insertion protrusion 25 is inserted into the insertion groove 154 , the module case 140 may be easily installed on the rear surface of the refrigerator compartment door 21 .
- the above-described coupling structure is only an example, and the module case 140 may be detachably installed on the rear surface of the refrigerator compartment door 21 using various coupling structures, such as a screw coupling structure and a hook coupling structure, as well as the above-described insertion structure.
- an insertion groove 158 and an insertion protrusion 162 may be formed at positions respectively corresponding to each other in the back case 150 and the cover 160 such that the cover 160 is coupled to the back case 150 .
- the above-described coupling structure is also an example, and the back case 150 and the cover 160 may be detachably coupled to each other using various coupling structures.
- the cover 160 when the cover 160 is coupled to the back case 150 , the carbon dioxide cylinder 120 in the module case 140 , the carbonated water tank 110 , and the integrated valve assembly 130 may not be exposed to the outside. Accordingly, the aesthetic value of the refrigerator compartment door 21 may not be decreased.
- a ventilation opening 161 through which an inside of the module case 140 is communicated with the outside is formed in the cover 160 , even when the cover 160 is coupled to the back case 150 , cold air in the storage chamber is supplied to the carbonated water tank 110 in the module case 140 , and carbonated water stored in the carbonated water tank 110 may be cooled or maintained at an optimum temperature.
- the refrigerator further includes a safety unit 750 which couples the carbon dioxide cylinder 120 coupled to the cylinder connector 157 to the pressure regulator 201 .
- the safety unit 750 includes a safety lever 752 which is pivotably provided at a side of the cylinder connector 157 coupled to one side of the carbon dioxide cylinder 120 and selectively moves the carbon dioxide cylinder 120 toward or away from the pressure regulator 201 according to rotation.
- the cylinder connector 157 includes a cylinder connector main body 157 a having a cylindrical shape, a cylinder connector hole 157 b into which an suction nozzle 201 a of the pressure regulator 201 is inserted, a cylinder connector movable shaft 157 c formed to protrude from the cylinder connector main body 157 a, and a cylinder coupling portion 157 d to which a spray nozzle of the carbon dioxide cylinder 120 is screw coupled.
- the suction nozzle 201 a of the pressure regulator 201 and the spray nozzle of the carbon dioxide cylinder 120 are provided to be separated by a predetermined distance. This is for preventing the suction nozzle 201 a of the pressure regulator 201 and the spray nozzle of the carbon dioxide cylinder 120 from coupling together without an operation of the safety unit 750 even when the carbon dioxide cylinder 120 is coupled to the cylinder connector 157 .
- the safety lever 752 includes a lever portion 754 which receives a force, a lever side portion 756 including a lever rotational shaft portion 756 a provided so that the safety lever 752 is pivotable, and a cylinder connector separation portion 758 which is provided at the lever side portion 756 and pushes away the cylinder connector movable shaft 157 c.
- the cylinder connector 157 may be detached from the pressure regulator 201 .
- the lever side portion 756 is formed to be bent from the lever portion 754 toward both sides, and the lever side portion 756 includes the lever rotational shaft portion 756 a provided so that the lever portion 754 is pivotable at a side of the pressure regulator 201 .
- the safety unit 750 includes a safety lever holder 760 for converting a rotary motion of the safety lever 752 into a forward or backward motion of the cylinder connector 157 .
- the safety lever holder 760 is a component provided at a rear surface of the pressure regulator 201 , and includes a holder coupling shaft 760 b coupled to the safety lever 752 , and a cylinder connector seating groove 760 a in which the cylinder connector movable shaft 157 c is seated.
- a safety lever coupling shaft 756 b is provided at the lever side portion 756 of the safety lever 752 to be coupled to the safety lever holder 760 .
- the safety lever coupling shaft 756 b is provided to be separated from the lever rotational shaft portion 756 a. As the holder coupling shaft 760 b and the safety lever coupling shaft 756 b of the safety lever holder 760 are coupled, the rotary motion of the safety lever 752 is transferred to the safety lever holder 760 .
- the cylinder connector seating groove 760 a in which the cylinder connector movable shaft 157 c is seated is provided to have a recessed shape in the safety lever holder 760 .
- the cylinder connector seating groove 760 a is seated to support a lower portion of the cylinder connector movable shaft 157 c.
- the pressure regulator 201 includes a cylinder connector rail case 201 c to surround the cylinder connector 157 .
- a cylinder connector rail 201 d which guides a vertical movement of the cylinder connector movable shaft 157 c is provided in a side of the cylinder connector rail case 201 c.
- a pressure regulator rotational shaft 711 which protrudes from a side to have a shaft shape so that the pressure regulator 201 is pivotable, is provided in a side of the pressure regulator 201 .
- an inner structure of the pressure regulator 201 may be protected from the external environment.
- a gas cylinder guide portion 780 which guides the carbon dioxide cylinder 120 having a cylindrical shape may be provided at one side of the carbon dioxide cylinder 120 .
- the gas cylinder guide portion 780 includes a cylinder close contacting guide portion 780 a which guides at least one side of the carbon dioxide cylinder 120 in a lengthwise direction of the carbon dioxide cylinder 120 having the cylindrical shape while in close contact therewith, a cylinder separation guide portion 780 b which is provided on the cylinder close contacting guide portion 780 a and is separated from the carbon dioxide cylinder 120 by a predetermined distance, and a cylinder seating portion 780 c on which a lower portion of the carbon dioxide cylinder 120 is seated.
- a relief valve 800 is provided in a connection channel 200 a which connects the pressure regulator 201 and the solenoid switch valve 202 , wherein the relief valve 800 decreases a pressure by discharging carbon dioxide in the connection channel 200 a when the pressure of the carbon dioxide in the connection channel 200 a is greater than a predetermined pressure limit.
- connection channel 200 a refers to a part of the carbon dioxide supply channel 200 which connects the pressure regulator 201 and the carbonated water tank 110 to supply carbon dioxide to the carbonated water tank 110 , and refers to a section between the pressure regulator 201 and the solenoid switch valve 202 in the carbon dioxide supply channel 200 .
- connection channel 200 a The reason why the relief valve 800 is provided in the connection channel 200 a is that the solenoid switch valve 202 does not operate normally when the connection channel 200 a is congested with carbon dioxide and the carbon dioxide absorbs external heat to increase the temperature, and thus the pressure increases to a high pressure.
- the carbon dioxide compressed at a pressure of about 45 to 60 bar and charged in the carbon dioxide cylinder 120 is discharged at a pressure of about 8.5 bar or less through the pressure regulator 201 , according to an algorithm, when the solenoid switch valve 202 is closed, the connection channel 200 a which connects the pressure regulator 201 and the solenoid switch valve 202 is congested with the carbon dioxide discharged from the pressure regulator 201 . At this time, as the temperature of the carbon dioxide increases due to external heat, the pressure may increase to a high pressure of 8.5 bar or more.
- a pressure in the connection channel 200 a may further increase.
- the reason is that, in the above-described case, as carbon dioxide flows fast in the pressure regulator 201 , a temperature thereof decreases sharply, and the carbon dioxide is discharged from the pressure regulator 201 in a state in which the carbon dioxide is not evaporated sufficiently.
- the carbon dioxide discharged in a liquid state may absorb heat in the connection channel 200 a, be evaporated, and have a further high pressure.
- a pressure of the solenoid switch valve 202 is about 15 bar or more, an opening operation is not performed easily according to an inner structure of the solenoid switch valve 202 , and thus, when the carbon dioxide in the connection channel 200 a has a high pressure of 15 bar or more, the solenoid switch valve 202 may be not opened.
- the relief valve 800 may have a mechanical structure using an elastic force, and may be provided to discharge carbon dioxide to the atmosphere when the pressure of the carbon dioxide in the connection channel 200 a reaches a predetermined pressure limit.
- the predetermined pressure limit may be determined to be in the range of about 9.5 to 11.5 bar.
- the relief valve 800 discharges the carbon dioxide to the atmosphere and maintains the pressure of the carbon dioxide in the connection channel 200 a at the pressure limit or less. Accordingly, a malfunction of the solenoid switch valve 202 due to a high pressure may not occur, and thus the reliability and safety of a carbonated water manufacturing system may be improved.
- the detail structure of the above-described relief valve 800 may be provided variously, and examples thereof may be provided as those illustrated in FIGS. 8 and 9 .
- the relief valve 800 may include a first relief valve body 810 , a second relief valve body 820 coupled to the first relief valve body 810 , a relief main channel 811 formed in the first relief valve body 810 and having both ends in communication with the connection channel 200 a, a relief discharge channel 821 formed in the second relief valve body 820 and having one end which communicates with the relief main channel 811 and the other end having an opening facing the outside, a relief switch member 830 which moves forward or backward due to a pressure of carbon dioxide in the relief main channel 811 to open or close the relief discharge channel 821 , and a relief elastic member 840 which elastically supports the relief switch member 830 .
- the relief valve 800 may also include an inlet 801 and an outlet 802 to which the connection channel 200 a is connected, a packing member 831 provided in the relief switch member 830 to seal the relief discharge channel 821 , and an adjusting screw 850 for adjusting an elastic force of the relief elastic member 840 .
- the relief switch member 830 may overcome the elastic force of the relief elastic member 840 , may move in one direction, and may open the relief discharge channel 821 .
- the relief switch member 830 may move in a direction opposite the one direction due to the elastic force of the relief elastic member 840 , and may close the relief discharge channel 821 .
- FIG. 11 is a perspective view illustrating a low pressure sensor integrated relief valve of a refrigerator according to another embodiment of the present invention and a peripheral structure thereof
- FIG. 12 is a view illustrating a coupling relationship of the low pressure sensor integrated relief valve of the refrigerator of FIG. 11
- FIG. 13 is an exploded perspective view illustrating a structure of the low pressure sensor integrated relief valve of the refrigerator of FIG. 11
- FIG. 14 is a cross-sectional view illustrating the low pressure sensor integrated relief valve of the refrigerator of FIG. 11 when a valve discharge channel is closed and a micro switch is turned off
- FIG. 15 is a cross-sectional view illustrating the low pressure sensor integrated relief valve of the refrigerator of FIG. 11 when the valve discharge channel is open and the micro switch is turned off
- FIG. 12 is a view illustrating a coupling relationship of the low pressure sensor integrated relief valve of the refrigerator of FIG. 11
- FIG. 13 is an exploded perspective view illustrating a structure of the low pressure sensor integrated relief valve of the refrigerator of FIG. 11
- FIG. 14 is
- FIG. 16 is a cross-sectional view illustrating the low pressure sensor integrated relief valve of the refrigerator of FIG. 11 when the valve discharge channel is closed and the micro switch is turned on
- FIG. 17 is a circuit diagram for describing a process of carbonated water generating and discharging of the refrigerator of FIG. 11 .
- a carbonated water production device of the refrigerator according to another embodiment of the present invention will be described in detail with reference to FIGS. 11 to 17 .
- the same reference number as that of one embodiment of the present invention refers to the same component in the drawings and a detail description thereof may be omitted.
- a refrigerator includes, instead of the relief valve of one embodiment, a low pressure sensor integrated relief valve 900 , a notifier 321 which notifies of a replacement time of a carbon dioxide cylinder, and a controller 310 which receives a low pressure signal sent from the low pressure sensor integrated relief valve 900 and controls the notifier 321 .
- the low pressure sensor integrated relief valve 900 integrates a low pressure sensor which senses a low pressure of carbon dioxide when the carbon dioxide is at a low pressure, and a relief valve which discharges carbon dioxide to the atmosphere when the carbon dioxide is at a high pressure, and is installed on a connection channel 200 a which connects a pressure regulator 201 and a solenoid switch valve 202 .
- the low pressure sensor integrated relief valve 900 When a pressure of carbon dioxide in the connection channel 200 a is less than a predetermined replacement pressure, the low pressure sensor integrated relief valve 900 generates a low pressure signal, and when the pressure of the carbon dioxide in the connection channel 200 a is greater than the predetermined replacement pressure, the low pressure sensor integrated relief valve 900 discharges the carbon dioxide in the connection channel 200 a to the atmosphere.
- the carbon dioxide cylinder 120 is charged at a pressure in the range of about 45 to 60 bar, and is consumable, a pressure of the carbon dioxide cylinder 120 decreases as carbon dioxide is consumed, and thus the carbon dioxide cylinder 120 has to be replaced when all of the carbon dioxide is consumed or the pressure thereof is not sufficient.
- the replacement time of the carbon dioxide cylinder 120 is not properly notified of, a user may recognize whether all of the carbon dioxide of the carbon dioxide cylinder 120 is consumed or the pressure thereof is not sufficient through only sipping carbonated water and tasting it.
- the low pressure sensor integrated relief valve 900 senses first a pressure of carbon dioxide in the connection channel 200 a and determines whether the pressure is low enough to need a replacement.
- the low pressure sensor integrated relief valve 900 when the pressure of the carbon dioxide in the connection channel 200 a is less than the predetermined replacement pressure, the low pressure sensor integrated relief valve 900 generates a low pressure signal.
- the predetermined replacement pressure may be determined to be in the range of about 7.3 to 7.7 bar.
- the pressure regulator 201 is provided to discharge carbon dioxide at a pressure of about 8.5 bar, when a pressure of carbon dioxide discharged from the pressure regulator 201 is in the range of 7.3 to 7.7 bar, a pressure of carbon dioxide of the carbon dioxide cylinder 120 has already reached a level in the range of 7.3 to 7.7 bar.
- the notifier 321 may include a display provided on a door. Specifically, the notifier 321 may include a light emitting diode (LED) and the like, and may emit light to visually display that the replacement time of the carbon dioxide cylinder 120 has arrived.
- LED light emitting diode
- the low pressure sensor integrated relief valve 900 discharges the carbon dioxide in the connection channel 200 a to the atmosphere and decreases the pressure of the carbon dioxide in the connection channel 200 a similar to the relief valve of the above-described embodiment. Since an operation of discharging carbon dioxide is the same as that of the relief valve of the above-described embodiment, a detail description thereof will be omitted.
- the predetermined pressure limit at which the low pressure sensor integrated relief valve 900 is open may be determined to be in the range of 9.5 to 11.5 bar, similar to the above-described embodiment.
- the detail structure of the low pressure sensor integrated relief valve 900 may be provided variously, and examples thereof may be provided as those illustrated in FIGS. 12 to 16 .
- the low pressure sensor integrated relief valve 900 may include a valve body portion 910 which includes an upper case 910 a, a middle case 910 b, and a lower case 910 c, a valve main channel 911 which is formed in the valve body portion 910 and has both ends in communication with the connection channel 200 a, a diaphragm 920 installed in the valve body portion 910 , a partition space 912 partitioned from the valve main channel 911 by the diaphragm 920 , a pusher 930 which moves forward or backward due to a pressure of carbon dioxide in the valve main channel 911 , a micro switch 940 pressed by the pusher 930 to be turned on or off, a pusher elastic member 950 which elastically supports the pusher 930 , a valve discharge channel 913 formed in the valve body portion 910 and having one end in communication with the valve main channel 911 and the other end having an opening facing the outside, a valve switch member 960 which moves forward or backward due to a pressure of carbon dioxide in the valve main channel
- the upper case 910 a, the middle case 901 b, and the lower case 901 c may be coupled by screws S.
- the low pressure sensor integrated relief valve 900 may also include an inlet 901 and an outlet 902 which are connected to the connection channel 200 a, a spring support portion 951 which supports the pusher elastic member 950 , an adjusting screw 952 for adjusting an elastic force of the pusher elastic member 950 , a packing member 961 provided in the valve switch member 960 to seal the valve discharge channel 913 , an adjusting screw 980 for adjusting an elastic force of the valve elastic member 970 , and a valve support body 990 coupled to the valve body portion 910 .
- the low pressure sensor integrated relief valve 900 may be installed at the solenoid switch valve 202 .
- the micro switch 940 may include an actuator 941 which protrudes to be pressed by the pusher 930 , and when the actuator 941 is pressed by the pusher 930 , the micro switch 940 may be turned off internally.
- the actuator 941 When the actuator 941 is released from the pressure of the pusher 930 , the actuator 941 returns to an original state due to an elastic force of an elastic member in the micro switch 940 , and when the actuator 941 returns to the original state, the micro switch 940 may be turned on.
- the micro switch 940 when the pusher 930 presses the actuator 941 , the micro switch 940 may also be turned on, and when the actuator 941 is released from the pressure of the pusher 930 , the micro switch 940 may also be provided to be turned off, unlike the present embodiment. In the above-described case, the micro switch 940 has to be provided above the pusher 930 unlike the present embodiment.
- a pressure in the connection channel 200 a is transferred to the valve main channel 911 using the above-described structure, as illustrated in FIG. 14 , and the pressure in the connection channel 200 a is greater than a predetermined replacement pressure (about 7.3 to 7.7 bar) and smaller than a predetermined pressure limit (about 9.5 to 11.5 bar)
- the pusher 930 overcomes an elastic force of the pusher elastic member 950 , moves in one direction, and presses the actuator 941 of the micro switch 940 , and the micro switch 940 is turned off.
- the valve switch member 960 moves in one direction due to an elastic force of the valve elastic member 970 , and closes the valve discharge channel 913 .
- the valve switch member 960 overcomes an elastic force of the valve elastic member 970 , moves in a direction opposite the one direction, and opens the valve discharge channel 913 .
- the pusher 930 moves in a direction opposite the one direction due to an elastic force of the pusher elastic member 950 , and is separated from the micro switch 940 , and the micro switch 940 turns on.
- the micro switch 940 When the micro switch 940 is turned on, the micro switch 940 sends a low pressure signal to the controller 310 .
- the low pressure sensor which senses a pressure when a pressure of carbon dioxide is less than the predetermined replacement pressure, and the relief valve which discharges carbon dioxide to the atmosphere when the pressure of the carbon dioxide is greater than the predetermined pressure limit are integrated, components may be simplified and assembly may be easy compared to a structure in which a low pressure sensor and a relief valve are provided separately. In addition, since a space occupied thereby decreases, the utilization of the space may be improved.
- FIG. 18 is a view illustrating a replacement notifier of a carbon dioxide cylinder of the refrigerator of FIG. 11
- FIG. 19 is a control block diagram of the refrigerator of FIG. 11 .
- FIGS. 18 and 19 A control method of the refrigerator according to another embodiment of the present invention will be described with reference to FIGS. 18 and 19 .
- the refrigerator according to another embodiment of the present invention may further include an input portion 300 through which discharging of carbonated water or purified water is input, a display portion 320 which indicates whether carbonated water is generated or not, and a controller 310 which controls an opening or closing of an exhaust valve 251 , a solenoid switch valve 202 , a water supply solenoid valve 211 , a water discharge solenoid valve 221 , and an carbonated water discharge solenoid valve 231 , and an operation of the display portion 320 based on information received from a water level sensor 111 , a temperature sensor 112 , and the input portion 300 .
- the controller 310 may receive a low pressure signal sent from the micro switch 940 of the low pressure sensor integrated relief valve 900 , and may control an operation of the display portion 320 .
- the input portion 300 and the display portion 320 may be provided in an integrated display unit 330 , and the display portion 320 may include a notifier 321 which notifies of the replacement time of the carbon dioxide cylinder 120 .
- the low pressure sensor integrated relief valve 900 may sense a pressure of carbon dioxide in the connection channel 200 a.
- the low pressure sensor integrated relief valve 900 may send the low pressure signal to the controller 310 , and the controller 310 may control the notifier 321 of the display portion 320 to notify of a replacement time.
- the low pressure sensor integrated relief valve 900 When the sensed pressure is greater than a predetermined pressure limit, the low pressure sensor integrated relief valve 900 is mechanically opened and may discharge carbon dioxide in the connection channel 200 a to the atmosphere.
Abstract
Description
- This application is a U.S. national stage application of International Application No. PCT/KR2014/007924 filed Aug. 26, 2014, and claims the benefit of Korean Application No. 10-2013-0106868, filed Sep. 5, 2013, in the Korean Intellectual Property Office, the disclosures of which are incorporated herein by reference.
- 1. Field
- The present invention relates to a refrigerator having a carbonated water generating module.
- 2. Description of the Related Art
- In general, refrigerators are devices which include storage chambers which store food and cold air supply units which supply cold air to the storage chambers, and thus maintain the freshness of the stored food. The refrigerators may include ice-making devices which make ice, and dispensers from which users extract water or the ice from the outside without opening doors to meet the requirement of the users, and furthermore, may also include carbonated water production devices which generate carbonated water.
- The carbonated water production device includes a carbon dioxide cylinder in which a high pressure carbon dioxide gas is stored, and a carbonated water tank in which carbonated water is produced by mixing carbon dioxide and water.
- In addition, the carbonated water production device includes a pressure regulator which adjusts a pressure of the carbon dioxide discharged from the carbon dioxide cylinder, and a solenoid switch valve which regulates supplying of the carbon dioxide discharged from the pressure regulator to the carbonated water tank.
- When the carbon dioxide charged in the carbon dioxide cylinder is discharged, the pressure regulator adjusts the pressure thereof to about 8.5 bar for discharging the carbon dioxide. This is a suitable pressure for mixing the carbon dioxide and water in the carbonated water tank. When a connection channel between the pressure regulator and the solenoid switch valve is congested with the carbon dioxide discharged from the pressure regulator, the carbon dioxide may be heated by external heat and a pressure thereof can increase. When the pressure of the carbon dioxide increases as described above, there is a problem in that the solenoid switch valve cannot be opened.
- In addition, since the carbon dioxide cylinder is a consumable component, when the carbon dioxide is all exhausted, the carbon dioxide cylinder should be replaced.
- The present invention is directed to providing a refrigerator including a carbonated water production device which prevents a malfunction of a solenoid switch valve among a pressure regulator which adjusts a pressure of carbon dioxide charged in a carbon dioxide cylinder and discharges the carbon dioxide, and the solenoid switch valve which regulates supplying of the carbon dioxide discharged from the pressure regulator to a carbonated water tank even when the pressure of the carbon dioxide increases, and has a system having improved reliability and safety.
- In addition, the present invention is also directed to providing a refrigerator including a notifier which senses when carbon dioxide charged in a carbon dioxide cylinder is consumed and when a replacement of the carbon dioxide cylinder is needed, and displays the replacement of the carbon dioxide cylinder to the outside.
- One aspect of the present invention provides a refrigerator including: a main body; a carbonated water tank in which carbon dioxide and water are mixed to produce carbonated water; a carbon dioxide cylinder in which carbon dioxide is charged; a pressure regulator which adjusts a pressure of carbon dioxide discharged from the carbon dioxide cylinder and discharges the carbon dioxide; a solenoid switch valve which regulates supplying of the carbon dioxide discharged from the pressure regulator to the carbonated water tank; a connection channel which connects the pressure regulator and the solenoid switch valve; and a relief valve which is provided in the connection channel to discharge carbon dioxide in the connection channel to the atmosphere when a pressure of the carbon dioxide in the connection channel is greater than a predetermined pressure limit.
- A pressure of carbon dioxide which flows into the solenoid switch valve may be maintained equal to or less than the predetermined pressure limit by operating the relief valve, and a malfunction of the solenoid switch valve due to a high pressure may be prevented.
- The predetermined pressure limit may be determined to be in the range of 9.5 to 11.5 bar.
- The relief valve may include: a first relief valve body; a second relief valve body coupled to the first relief valve body; a relief main channel which is formed in the first relief valve body and having both ends each in communication with the connection channel; a relief discharge channel which is formed in the second relief valve body, has one end which communicates with the relief main channel, and the other end having an opening facing the outside; a relief switch member which moves forward or backward due to a pressure of carbon dioxide in the relief main channel and opens or closes the relief discharge channel; and a relief elastic member which elastically supports the relief switch member.
- When a pressure of carbon dioxide in the connection channel is greater than the predetermined pressure limit, the relief switch member may move in one direction and open the relief discharge channel, and when a pressure of the carbon dioxide in the connection channel is less than the predetermined pressure limit, the relief switch member may move in a direction opposite the one direction, and close the relief discharge channel.
- Another aspect of the present invention provides a refrigerator including: a main body; a storage chamber provided in the main body; a door which opens or closes the storage chamber; a carbonated water tank in which carbon dioxide and water are mixed to produce carbonated water; a carbon dioxide cylinder in which carbon dioxide is charged; a pressure regulator which adjusts a pressure of carbon dioxide discharged from the carbon dioxide cylinder and discharges the carbon dioxide; a solenoid switch valve which regulates supplying of the carbon dioxide discharged from the pressure regulator to the carbonated water tank; a connection channel which connects the pressure regulator and the solenoid switch valve; a notifier which notifies of a replacement time of the carbon dioxide cylinder; a low pressure sensor integrated relief valve which sends a low pressure signal when a pressure of carbon dioxide in the connection channel is less than a predetermined replacement pressure, and discharges the carbon dioxide in the connection channel when a pressure of the carbon dioxide in the connection channel is greater than a predetermined pressure limit; and a controller which receives the low pressure signal sent from the low pressure sensor integrated relief valve, and controls the notifier to notify of a replacement time of the carbon dioxide cylinder.
- The notifier may include a display unit provided on the door.
- A pressure of carbon dioxide which flows into the solenoid switch valve may be maintained equal to or less than the predetermined pressure limit by operating the low pressure sensor integrated relief valve, and a malfunction of the solenoid switch valve due to a high pressure may be prevented.
- The predetermined replacement pressure may be determined to be in the range of 7.3 to 7.7 bar.
- The predetermined pressure limit may be determined to be in the range of 9.5 to 11.5 bar.
- The low pressure sensor integrated relief valve m installed at an inlet of the solenoid switch valve.
- The low pressure sensor integrated relief valve may include: a valve body; a valve main channel which is formed in the valve body and has both ends in communication with the connection channel; a diaphragm installed in the valve body; a partition space partitioned from the valve main channel by the diaphragm; a pusher which moves forward or backward due to a pressure of carbon dioxide in the valve main channel; a micro switch which is pressed by the pusher and is turned on or off; and a pusher elastic member which elastically supports the pusher.
- When a pressure of carbon dioxide in the connection channel is less than the replacement pressure, the pusher may move in one direction, be separated from the micro switch, and turn on the micro switch, and when a pressure of the carbon dioxide in the connection channel is greater than the replacement pressure, the pusher may move in a direction opposite the one direction, press the micro switch, and turn off the micro switch.
- When the micro switch is turned on, the micro switch may send a low pressure signal to the controller.
- The low pressure sensor integrated relief valve may include: a valve body; a valve main channel which is formed in the valve body and has both ends in communication with the connection channel; a valve discharge channel which is formed in the valve body, has one end in communication with the valve main channel, and the other end having an opening facing the outside; a valve switch member which moves forward or backward due to a pressure of carbon dioxide in the valve main channel and opens or closes the valve discharge channel; and a valve elastic member which elastically supports the valve switch member.
- When a pressure of carbon dioxide in the connection channel is greater than the predetermined pressure limit, the valve switch member may move in one direction and open the valve discharge channel, and when a pressure of the carbon dioxide in the connection channel is less than the predetermined pressure limit, the switching member may move in another direction and close the valve discharge channel.
- Still another aspect of the present invention provides a method of controlling a refrigerator which includes a carbonated water tank in which carbon dioxide and water are mixed to produce carbonated water, a carbon dioxide cylinder in which carbon dioxide is charged, a pressure regulator which adjusts a pressure of carbon dioxide discharged from the carbon dioxide cylinder and discharges the carbon dioxide, a solenoid switch valve which regulates supplying of the carbon dioxide discharged from the pressure regulator to the carbonated water tank, a connection channel which connects the pressure regulator and the solenoid switch valve, a notifier which notifies of a replacement time of the carbon dioxide cylinder, and a low pressure sensor integrated relief valve provided in the connection channel, the method including: sensing a pressure of carbon dioxide in the connection channel by the low pressure sensor integrated relief valve; displaying a replacement time by the notifier when the sensed pressure is less than a predetermined replacement pressure; and discharging the carbon dioxide in the connection channel to the atmosphere by the low pressure sensor integrated relief valve when the sensed pressure is greater than a predetermined pressure limit.
- According to exemplary embodiments of the present invention, a relief valve disposed between a pressure regulator and a carbon dioxide switching valve reduces a pressure of carbon dioxide by discharging the carbon dioxide to the atmosphere between the pressure regulator which adjusts the pressure of the carbon dioxide discharged from a carbon dioxide cylinder and discharges the carbon dioxide and a solenoid switch valve which regulates supplying of the carbon dioxide to a carbonated water tank, thereby the relief valve can prevent a malfunction of a solenoid switch valve due to a high pressure. Accordingly, the reliability and safety of the carbonated water making system can be improved.
- A low pressure sensor which senses a low pressure of carbon dioxide is provided in the relief valve, when carbon dioxide has a pressure equal to or less than a predetermined replacement pressure, the low pressure sensor transmits a signal to a notifier, and thus the notifier can easily recognize that the replacement time of the carbon dioxide cylinder is close.
- Since the relief valve and the low pressure sensor are integrally formed, components are simplified and the space utilization can be improved when compared to a case in which the relief valve and the low pressure sensor are provided separately.
-
FIG. 1 is a perspective view illustrating an exterior of a refrigerator according to one embodiment of the present invention. -
FIG. 2 is a perspective view illustrating an inside of the refrigerator ofFIG. 1 . -
FIG. 3 is an exploded perspective view illustrating an assembly structure of a carbonated water generating module of the refrigerator ofFIG. 1 . -
FIG. 4 is a perspective view when a cover of the carbonated water generating module of the refrigerator ofFIG. 1 is separated therefrom. -
FIG. 5 is an exploded perspective view illustrating a pressure regulator of the refrigerator ofFIG. 1 and a peripheral structure thereof. -
FIG. 6 is a cross-sectional view illustrating the pressure regulator of the refrigerator ofFIG. 1 and the peripheral structure thereof. -
FIG. 7 is a perspective view illustrating a relief valve of the refrigerator ofFIG. 1 and a peripheral structure thereof. -
FIG. 8 is a cross-sectional view illustrating a structure of the relief valve of the refrigerator ofFIG. 1 when the relief valve is closed. -
FIG. 9 is a cross-sectional view illustrating a structure of the relief valve of the refrigerator ofFIG. 1 when the relief valve is open. -
FIG. 10 is a circuit diagram for describing a process of generating and discharging carbonated water in the refrigerator ofFIG. 1 . -
FIG. 11 is a perspective view illustrating a low pressure sensor integrated relief valve of a refrigerator according to another embodiment of the present invention and a peripheral structure thereof. -
FIG. 12 is a view illustrating a coupling relationship of the low pressure sensor integrated relief valve of the refrigerator ofFIG. 11 . -
FIG. 13 is an exploded perspective view illustrating a structure of the low pressure sensor integrated relief valve of the refrigerator ofFIG. 11 . -
FIG. 14 is a cross-sectional view illustrating the low pressure sensor integrated relief valve of the refrigerator ofFIG. 11 when a valve discharge channel is closed and a micro switch is turned off. -
FIG. 15 is a cross-sectional view illustrating the low pressure sensor integrated relief valve of the refrigerator ofFIG. 11 when the valve discharge channel is open and the micro switch is turned off. -
FIG. 16 is a cross-sectional view illustrating the low pressure sensor integrated relief valve of the refrigerator ofFIG. 11 when the valve discharge channel is closed and the micro switch is turned on. -
FIG. 17 is a circuit diagram for describing a process of generating and discharging carbonated water in the refrigerator ofFIG. 11 . -
FIG. 18 is a view illustrating a replacement notifier of a carbon dioxide cylinder of the refrigerator ofFIG. 11 . -
FIG. 19 is a control block diagram of the refrigerator ofFIG. 11 . - Hereinafter, exemplary embodiments of the present invention will be described in detail.
-
FIG. 1 is a perspective view illustrating an exterior of a refrigerator according to one embodiment of the present invention, andFIG. 2 is a perspective view illustrating an inside of the refrigerator ofFIG. 1 . - Referring to
FIGS. 1 and 2 , therefrigerator 1 according to one embodiment of the present invention may include amain body 10,storage chambers main body 10, and a cold air supply unit (not shown) which supplies cold air to thestorage chambers - The
main body 10 may include inner boxes forming thestorage chambers storage chambers - The
storage chambers refrigerator compartment 20 positioned at an upper portion and afreezer compartment 30 positioned at a lower portion by anintermediate partition 11.Shelves 23 on which food may be placed, and at least onestorage box 27 which keeps food in a sealed state may be provided in therefrigerator compartment 20. - In addition, an ice-making
chamber 81 capable of generating ice may be formed at an upper corner of therefrigerator compartment 20. The ice-makingchamber 81 may be insulated and partitioned from therefrigerator compartment 20 by an ice-makingchamber case 82. An ice-makingdevice 80 such as an ice-making tray and an ice bucket which stores the ice generated in the ice-making tray may be provided in the ice-makingchamber 81. - Meanwhile, a
water tank 70 capable of storing water may be provided in therefrigerator compartment 20. As illustrated inFIG. 2 , thewater tank 70 may be provided between a plurality ofstorage boxes 27, but is not limited thereto. Thewater tank 70 may be provided in therefrigerator compartment 20 so that water in thewater tank 70 is cooled due to cold air in therefrigerator compartment 20. - The
water tank 70 may be connected to an external water source 40 (seeFIG. 10 ) such as tap water, and may store water purified by a water purifying filter 50 (seeFIG. 10 ). Achannel switching valve 60 may be provided in a water supply pipe which connects theexternal water source 40 and thewater tank 70, thechannel switching valve 60 may selectively supply water supplied by theexternal water source 40 to thewater tank 70 or the ice-makingdevice 80. - Each of the
refrigerator compartment 20 and thefreezer compartment 30 has an open front through which food is introduced or withdrawn, the open front of therefrigerator compartment 20 may be opened or closed by a pair ofrotational doors main body 10, and the open front of thefreezer compartment 30 may be opened or closed by a slidingdoor 31 which is movable by sliding with respect to themain body 10. Adoor guard 24 which may store food may be provided on the rear surface of therefrigerator compartment doors - Meanwhile,
gaskets 28 which seal between therefrigerator compartment doors main body 10 to keep cold air of therefrigerator compartment 20 when therefrigerator compartment doors refrigerator compartment doors rotational bar 26 which seals between therefrigerator compartment door 21 and therefrigerator compartment door 22 to keep the cold air of therefrigerator compartment 20 when therefrigerator compartment doors refrigerator compartment doors - In addition, a
dispenser 90 which may extract water or ice from the outside without opening therefrigerator compartment door 21 may be provided in any one refrigerator compartment door of therefrigerator compartment doors - The
dispenser 90 may include a water-intake space 91 into which a container, such as a cup, is inserted and through which water or ice may be withdrawn, acontrol panel 92 in which input buttons through which various settings of thedispenser 90 are input and a display which displays various types of information of thedispenser 90 are provided, and anoperation lever 93 which may operate thedispenser 90 to discharge water or ice. - In addition, the
dispenser 90 may include anice guide channel 94 which connects the ice-makingdevice 80 and the water-intake space 91 to discharge ice generated by the ice-makingdevice 80 to the water-intake space 91. - Meanwhile, a carbonated
water generating module 100 which generates carbonated water may be installed at a rear surface of therefrigerator compartment door 21 in which thedispenser 90 of therefrigerator 1 according to one embodiment of the present invention is provided. The carbonatedwater generating module 100 will be described in detail below. -
FIG. 3 is an exploded perspective view illustrating an assembly structure of a carbonated water generating module of the refrigerator ofFIG. 1 ,FIG. 4 is a perspective view when a cover of the carbonated water generating module of the refrigerator ofFIG. 1 is separated therefrom,FIG. 5 is an exploded perspective view illustrating a pressure regulator of the refrigerator ofFIG. 1 and a peripheral structure thereof,FIG. 6 is a cross-sectional view illustrating the pressure regulator of the refrigerator ofFIG. 1 and the peripheral structure thereof,FIG. 7 is a perspective view illustrating a relief valve of the refrigerator ofFIG. 1 and a peripheral structure thereof,FIG. 8 is a cross-sectional view illustrating a structure of the relief valve of the refrigerator ofFIG. 1 when the relief valve is closed,FIG. 9 is a cross-sectional view illustrating a structure of the relief valve of the refrigerator ofFIG. 1 when the relief valve is open, andFIG. 10 is a circuit diagram for describing a process of generating and discharging carbonated water in the refrigerator ofFIG. 1 . - Referring to
FIGS. 3 to 10 , the carbonatedwater generating module 100 for generating carbonated water in therefrigerator 1 may include acarbon dioxide cylinder 120 in which high pressure carbon dioxide is charged, acarbonated water tank 110 in which water and carbon dioxide are mixed to produce carbonated water, amodule case 140 which hasaccommodation spaces carbon dioxide cylinder 120 and thecarbonated water tank 110 and is coupled to the rear surface of therefrigerator compartment door 21, and anintegrated valve assembly 130. - The high pressure carbon dioxide in the range of about 45 to 60 bar may be charged in the
carbon dioxide cylinder 120. Thecarbon dioxide cylinder 120 may be installed in acylinder connector 157 of themodule case 140, and may be accommodated in alower accommodation space 153 of themodule case 140. - A carbon dioxide gas in the
carbon dioxide cylinder 120 may be supplied to thecarbonated water tank 110 through a carbondioxide supply channel 200 which connects thecarbon dioxide cylinder 120 and thecarbonated water tank 110. - A
pressure regulator 201 which adjusts a pressure of a carbon dioxide gas, asolenoid switch valve 202 which opens or closes the carbondioxide supply channel 200, and a carbon dioxide gasbackflow prevention valve 203 which prevents backflow of a carbon dioxide gas may be provided in the carbondioxide supply channel 200. - The
pressure regulator 201 may decrease a pressure of a carbon dioxide gas discharged from thecarbon dioxide cylinder 120 to about 8.5 bar to discharge the carbon dioxide gas. - Carbonated water is generated by mixing carbon dioxide supplied by the
carbon dioxide cylinder 120 and purified water supplied by thewater tank 70 in thecarbonated water tank 110 which may store the generated carbonated water. - The
carbonated water tank 110 may be connected with awater supply channel 210 to which water is supplied from thewater tank 70, a carbonatedwater discharge channel 230 which discharges the generated carbonated water to the water-intake space 91, anexhaust channel 250 which discharges residual carbon dioxide gas in thecarbonated water tank 110 before supplying water to thecarbonated water tank 110, as well as the above-described carbondioxide supply channel 200. - A water supply solenoid valve 211 which opens or closes a
water supply channel 210 may be provided in thewater supply channel 210. A carbonated waterdischarge solenoid valve 231 which opens or closes the carbonatedwater discharge channel 230, and acarbonated water regulator 232 which adjusts a pressure of discharged carbonated water may be provided in the carbonatedwater discharge channel 230. Anexhaust valve 251 which opens or closes theexhaust channel 250 may be provided in theexhaust channel 250. - Meanwhile, a
water level sensor 111 capable of measuring an amount of water supplied to thecarbonated water tank 110, and atemperature sensor 112 capable of measuring a temperature of water supplied to thecarbonated water tank 110 or a temperature of carbonated water generated by thecarbonated water tank 110 may be provided in thecarbonated water tank 110. - In addition, a
tank safety valve 114, which may discharge a high pressure carbon dioxide gas when the high pressure carbon dioxide gas having a pressure more than a predetermined pressure is supplied to thecarbonated water tank 110 due to a malfunction of thepressure regulator 201 and the like, may be provided in thecarbonated water tank 110. - The above-described
carbonated water tank 110 may be formed to have a predetermined size, and may be formed to accommodate about 1 l of purified water. In addition, thecarbonated water tank 110 may be formed of a stainless material to minimize a space occupied thereby, withstand high pressure, and have corrosion resistance. Thecarbonated water tank 110 may be accommodated in a firstupper accommodation space 151 of themodule case 140. Thecarbonated water tank 110 may be supported by abottom support portion 155 of themodule case 140 and a guide portion 156. - Meanwhile, the
integrated valve assembly 130 may be formed with the above-described water supply solenoid valve 211, the carbonated waterdischarge solenoid valve 231, and a waterdischarge solenoid valve 221. - That is, the water supply solenoid valve 211, the carbonated water
discharge solenoid valve 231, and the waterdischarge solenoid valve 221 may be integrally formed as one unit. The above-describedintegrated valve assembly 130 may be accommodated in a secondupper accommodation space 152 of themodule case 140. - The
module case 140 may include aback case 150 having one open side, and acover 160 coupled to the one open side of theback case 150. - At least one
insertion groove 154 may be formed at a position corresponding to at least oneinsertion protrusion 25 formed on the rear surface of therefrigerator compartment door 21, in themodule case 140. Accordingly, as theinsertion protrusion 25 is inserted into theinsertion groove 154, themodule case 140 may be easily installed on the rear surface of therefrigerator compartment door 21. However, the above-described coupling structure is only an example, and themodule case 140 may be detachably installed on the rear surface of therefrigerator compartment door 21 using various coupling structures, such as a screw coupling structure and a hook coupling structure, as well as the above-described insertion structure. - In addition, an insertion groove 158 and an
insertion protrusion 162 may be formed at positions respectively corresponding to each other in theback case 150 and thecover 160 such that thecover 160 is coupled to theback case 150. However, the above-described coupling structure is also an example, and theback case 150 and thecover 160 may be detachably coupled to each other using various coupling structures. - Meanwhile, when the
cover 160 is coupled to theback case 150, thecarbon dioxide cylinder 120 in themodule case 140, thecarbonated water tank 110, and theintegrated valve assembly 130 may not be exposed to the outside. Accordingly, the aesthetic value of therefrigerator compartment door 21 may not be decreased. - However, since a
ventilation opening 161 through which an inside of themodule case 140 is communicated with the outside is formed in thecover 160, even when thecover 160 is coupled to theback case 150, cold air in the storage chamber is supplied to thecarbonated water tank 110 in themodule case 140, and carbonated water stored in thecarbonated water tank 110 may be cooled or maintained at an optimum temperature. - An installation structure of the
carbon dioxide cylinder 120 and an operation of thepressure regulator 201 will be described with reference toFIGS. 5 to 7 . - The refrigerator further includes a
safety unit 750 which couples thecarbon dioxide cylinder 120 coupled to thecylinder connector 157 to thepressure regulator 201. Thesafety unit 750 includes asafety lever 752 which is pivotably provided at a side of thecylinder connector 157 coupled to one side of thecarbon dioxide cylinder 120 and selectively moves thecarbon dioxide cylinder 120 toward or away from thepressure regulator 201 according to rotation. - The
cylinder connector 157 includes a cylinder connectormain body 157 a having a cylindrical shape, acylinder connector hole 157 b into which an suction nozzle 201 a of thepressure regulator 201 is inserted, a cylinder connectormovable shaft 157 c formed to protrude from the cylinder connectormain body 157 a, and acylinder coupling portion 157 d to which a spray nozzle of thecarbon dioxide cylinder 120 is screw coupled. - Even after the
carbon dioxide cylinder 120 is coupled to thecylinder connector 157, the suction nozzle 201 a of thepressure regulator 201 and the spray nozzle of thecarbon dioxide cylinder 120 are provided to be separated by a predetermined distance. This is for preventing the suction nozzle 201 a of thepressure regulator 201 and the spray nozzle of thecarbon dioxide cylinder 120 from coupling together without an operation of thesafety unit 750 even when thecarbon dioxide cylinder 120 is coupled to thecylinder connector 157. - The
safety lever 752 includes alever portion 754 which receives a force, alever side portion 756 including a leverrotational shaft portion 756 a provided so that thesafety lever 752 is pivotable, and a cylinder connector separation portion 758 which is provided at thelever side portion 756 and pushes away the cylinder connectormovable shaft 157 c. - As the
lever portion 754 is provided to vertically move about the leverrotational shaft portion 756 a provided in thelever side portion 756, and thelever portion 754 is vertically moved, thecylinder connector 157 may be detached from thepressure regulator 201. - The
lever side portion 756 is formed to be bent from thelever portion 754 toward both sides, and thelever side portion 756 includes the leverrotational shaft portion 756 a provided so that thelever portion 754 is pivotable at a side of thepressure regulator 201. - The
safety unit 750 includes asafety lever holder 760 for converting a rotary motion of thesafety lever 752 into a forward or backward motion of thecylinder connector 157. - The
safety lever holder 760 is a component provided at a rear surface of thepressure regulator 201, and includes aholder coupling shaft 760 b coupled to thesafety lever 752, and a cylinderconnector seating groove 760 a in which the cylinder connectormovable shaft 157 c is seated. - A safety
lever coupling shaft 756 b is provided at thelever side portion 756 of thesafety lever 752 to be coupled to thesafety lever holder 760. The safetylever coupling shaft 756 b is provided to be separated from the leverrotational shaft portion 756 a. As theholder coupling shaft 760 b and the safetylever coupling shaft 756 b of thesafety lever holder 760 are coupled, the rotary motion of thesafety lever 752 is transferred to thesafety lever holder 760. - Specifically, when the
lever portion 754 is moved upward about the leverrotational shaft portion 756 a, the safetylever coupling shaft 756 b and theholder coupling shaft 760 b are moved upward, and thus thesafety lever holder 760 is moved upward. When thelever portion 754 is moved downward, the safetylever coupling shaft 756 b and theholder coupling shaft 760 b are moved downward, and thus thesafety lever holder 760 is moved downward. - The cylinder
connector seating groove 760 a in which the cylinder connectormovable shaft 157 c is seated is provided to have a recessed shape in thesafety lever holder 760. The cylinderconnector seating groove 760 a is seated to support a lower portion of the cylinder connectormovable shaft 157 c. As thesafety lever holder 760 is moved upward with the above-described structure, the cylinder connectormovable shaft 157 c is moved upward. - The
pressure regulator 201 includes a cylinderconnector rail case 201 c to surround thecylinder connector 157. Acylinder connector rail 201 d which guides a vertical movement of the cylinder connectormovable shaft 157 c is provided in a side of the cylinderconnector rail case 201 c. - A pressure regulator
rotational shaft 711, which protrudes from a side to have a shaft shape so that thepressure regulator 201 is pivotable, is provided in a side of thepressure regulator 201. As an outer surface of thepressure regulator 201 is surrounded by apressure regulator case 710, an inner structure of thepressure regulator 201 may be protected from the external environment. - A gas
cylinder guide portion 780 which guides thecarbon dioxide cylinder 120 having a cylindrical shape may be provided at one side of thecarbon dioxide cylinder 120. The gascylinder guide portion 780 includes a cylinder close contactingguide portion 780 a which guides at least one side of thecarbon dioxide cylinder 120 in a lengthwise direction of thecarbon dioxide cylinder 120 having the cylindrical shape while in close contact therewith, a cylinderseparation guide portion 780 b which is provided on the cylinder close contactingguide portion 780 a and is separated from thecarbon dioxide cylinder 120 by a predetermined distance, and acylinder seating portion 780 c on which a lower portion of thecarbon dioxide cylinder 120 is seated. - Meanwhile, as well illustrated in
FIG. 7 , arelief valve 800 is provided in aconnection channel 200 a which connects thepressure regulator 201 and thesolenoid switch valve 202, wherein therelief valve 800 decreases a pressure by discharging carbon dioxide in theconnection channel 200 a when the pressure of the carbon dioxide in theconnection channel 200 a is greater than a predetermined pressure limit. - Here, the
connection channel 200 a refers to a part of the carbondioxide supply channel 200 which connects thepressure regulator 201 and thecarbonated water tank 110 to supply carbon dioxide to thecarbonated water tank 110, and refers to a section between thepressure regulator 201 and thesolenoid switch valve 202 in the carbondioxide supply channel 200. - The reason why the
relief valve 800 is provided in theconnection channel 200 a is that thesolenoid switch valve 202 does not operate normally when theconnection channel 200 a is congested with carbon dioxide and the carbon dioxide absorbs external heat to increase the temperature, and thus the pressure increases to a high pressure. - Specifically, as described above, although the carbon dioxide compressed at a pressure of about 45 to 60 bar and charged in the
carbon dioxide cylinder 120 is discharged at a pressure of about 8.5 bar or less through thepressure regulator 201, according to an algorithm, when thesolenoid switch valve 202 is closed, theconnection channel 200 a which connects thepressure regulator 201 and thesolenoid switch valve 202 is congested with the carbon dioxide discharged from thepressure regulator 201. At this time, as the temperature of the carbon dioxide increases due to external heat, the pressure may increase to a high pressure of 8.5 bar or more. - Particularly, when the
carbon dioxide cylinder 120 is excessively charged or a newcarbon dioxide cylinder 120 is first installed, a pressure in theconnection channel 200 a may further increase. The reason is that, in the above-described case, as carbon dioxide flows fast in thepressure regulator 201, a temperature thereof decreases sharply, and the carbon dioxide is discharged from thepressure regulator 201 in a state in which the carbon dioxide is not evaporated sufficiently. The carbon dioxide discharged in a liquid state may absorb heat in theconnection channel 200 a, be evaporated, and have a further high pressure. - When a pressure of the
solenoid switch valve 202 is about 15 bar or more, an opening operation is not performed easily according to an inner structure of thesolenoid switch valve 202, and thus, when the carbon dioxide in theconnection channel 200 a has a high pressure of 15 bar or more, thesolenoid switch valve 202 may be not opened. - The
relief valve 800 may have a mechanical structure using an elastic force, and may be provided to discharge carbon dioxide to the atmosphere when the pressure of the carbon dioxide in theconnection channel 200 a reaches a predetermined pressure limit. Here, the predetermined pressure limit may be determined to be in the range of about 9.5 to 11.5 bar. - Using the above-described structure, when a pressure of carbon dioxide in the
connection channel 200 a increases and reaches a pressure limit, therelief valve 800 discharges the carbon dioxide to the atmosphere and maintains the pressure of the carbon dioxide in theconnection channel 200 a at the pressure limit or less. Accordingly, a malfunction of thesolenoid switch valve 202 due to a high pressure may not occur, and thus the reliability and safety of a carbonated water manufacturing system may be improved. - The detail structure of the above-described
relief valve 800 may be provided variously, and examples thereof may be provided as those illustrated inFIGS. 8 and 9 . - The
relief valve 800 may include a firstrelief valve body 810, a secondrelief valve body 820 coupled to the firstrelief valve body 810, a reliefmain channel 811 formed in the firstrelief valve body 810 and having both ends in communication with theconnection channel 200 a, arelief discharge channel 821 formed in the secondrelief valve body 820 and having one end which communicates with the reliefmain channel 811 and the other end having an opening facing the outside, arelief switch member 830 which moves forward or backward due to a pressure of carbon dioxide in the reliefmain channel 811 to open or close therelief discharge channel 821, and a reliefelastic member 840 which elastically supports therelief switch member 830. - The
relief valve 800 may also include aninlet 801 and anoutlet 802 to which theconnection channel 200 a is connected, a packingmember 831 provided in therelief switch member 830 to seal therelief discharge channel 821, and an adjustingscrew 850 for adjusting an elastic force of the reliefelastic member 840. - As illustrated in
FIG. 9 , when a pressure in theconnection channel 200 a is transferred to the reliefmain channel 811 using the above-described structure, and the pressure of the reliefmain channel 811 is greater than a predetermined pressure limit, therelief switch member 830 may overcome the elastic force of the reliefelastic member 840, may move in one direction, and may open therelief discharge channel 821. - On the contrary, as illustrated in
FIG. 8 , when the pressure of the reliefmain channel 811 is less than the predetermined pressure limit, therelief switch member 830 may move in a direction opposite the one direction due to the elastic force of the reliefelastic member 840, and may close therelief discharge channel 821. -
FIG. 11 is a perspective view illustrating a low pressure sensor integrated relief valve of a refrigerator according to another embodiment of the present invention and a peripheral structure thereof,FIG. 12 is a view illustrating a coupling relationship of the low pressure sensor integrated relief valve of the refrigerator ofFIG. 11 ,FIG. 13 is an exploded perspective view illustrating a structure of the low pressure sensor integrated relief valve of the refrigerator ofFIG. 11 ,FIG. 14 is a cross-sectional view illustrating the low pressure sensor integrated relief valve of the refrigerator ofFIG. 11 when a valve discharge channel is closed and a micro switch is turned off,FIG. 15 is a cross-sectional view illustrating the low pressure sensor integrated relief valve of the refrigerator ofFIG. 11 when the valve discharge channel is open and the micro switch is turned off,FIG. 16 is a cross-sectional view illustrating the low pressure sensor integrated relief valve of the refrigerator ofFIG. 11 when the valve discharge channel is closed and the micro switch is turned on, andFIG. 17 is a circuit diagram for describing a process of carbonated water generating and discharging of the refrigerator ofFIG. 11 . - A carbonated water production device of the refrigerator according to another embodiment of the present invention will be described in detail with reference to
FIGS. 11 to 17 . The same reference number as that of one embodiment of the present invention refers to the same component in the drawings and a detail description thereof may be omitted. - A refrigerator according to another embodiment of the present invention includes, instead of the relief valve of one embodiment, a low pressure sensor integrated
relief valve 900, anotifier 321 which notifies of a replacement time of a carbon dioxide cylinder, and acontroller 310 which receives a low pressure signal sent from the low pressure sensor integratedrelief valve 900 and controls thenotifier 321. - The low pressure sensor integrated
relief valve 900 integrates a low pressure sensor which senses a low pressure of carbon dioxide when the carbon dioxide is at a low pressure, and a relief valve which discharges carbon dioxide to the atmosphere when the carbon dioxide is at a high pressure, and is installed on aconnection channel 200 a which connects apressure regulator 201 and asolenoid switch valve 202. - When a pressure of carbon dioxide in the
connection channel 200 a is less than a predetermined replacement pressure, the low pressure sensor integratedrelief valve 900 generates a low pressure signal, and when the pressure of the carbon dioxide in theconnection channel 200 a is greater than the predetermined replacement pressure, the low pressure sensor integratedrelief valve 900 discharges the carbon dioxide in theconnection channel 200 a to the atmosphere. - As described above, the
carbon dioxide cylinder 120 is charged at a pressure in the range of about 45 to 60 bar, and is consumable, a pressure of thecarbon dioxide cylinder 120 decreases as carbon dioxide is consumed, and thus thecarbon dioxide cylinder 120 has to be replaced when all of the carbon dioxide is consumed or the pressure thereof is not sufficient. - However, when the replacement time of the
carbon dioxide cylinder 120 is not properly notified of, a user may recognize whether all of the carbon dioxide of thecarbon dioxide cylinder 120 is consumed or the pressure thereof is not sufficient through only sipping carbonated water and tasting it. - To this end, the low pressure sensor integrated
relief valve 900 senses first a pressure of carbon dioxide in theconnection channel 200 a and determines whether the pressure is low enough to need a replacement. - That is, when the pressure of the carbon dioxide in the
connection channel 200 a is less than the predetermined replacement pressure, the low pressure sensor integratedrelief valve 900 generates a low pressure signal. Here, the predetermined replacement pressure may be determined to be in the range of about 7.3 to 7.7 bar. - As described above, since the
pressure regulator 201 is provided to discharge carbon dioxide at a pressure of about 8.5 bar, when a pressure of carbon dioxide discharged from thepressure regulator 201 is in the range of 7.3 to 7.7 bar, a pressure of carbon dioxide of thecarbon dioxide cylinder 120 has already reached a level in the range of 7.3 to 7.7 bar. - The
notifier 321 may include a display provided on a door. Specifically, thenotifier 321 may include a light emitting diode (LED) and the like, and may emit light to visually display that the replacement time of thecarbon dioxide cylinder 120 has arrived. - When a pressure of carbon dioxide in the
connection channel 200 a is greater than a predetermined pressure limit, the low pressure sensor integratedrelief valve 900 discharges the carbon dioxide in theconnection channel 200 a to the atmosphere and decreases the pressure of the carbon dioxide in theconnection channel 200 a similar to the relief valve of the above-described embodiment. Since an operation of discharging carbon dioxide is the same as that of the relief valve of the above-described embodiment, a detail description thereof will be omitted. - Here, the predetermined pressure limit at which the low pressure sensor integrated
relief valve 900 is open may be determined to be in the range of 9.5 to 11.5 bar, similar to the above-described embodiment. - The detail structure of the low pressure sensor integrated
relief valve 900 may be provided variously, and examples thereof may be provided as those illustrated inFIGS. 12 to 16 . - The low pressure sensor integrated
relief valve 900 may include avalve body portion 910 which includes anupper case 910 a, amiddle case 910 b, and alower case 910 c, a valvemain channel 911 which is formed in thevalve body portion 910 and has both ends in communication with theconnection channel 200 a, adiaphragm 920 installed in thevalve body portion 910, apartition space 912 partitioned from the valvemain channel 911 by thediaphragm 920, apusher 930 which moves forward or backward due to a pressure of carbon dioxide in the valvemain channel 911, amicro switch 940 pressed by thepusher 930 to be turned on or off, a pusherelastic member 950 which elastically supports thepusher 930, avalve discharge channel 913 formed in thevalve body portion 910 and having one end in communication with the valvemain channel 911 and the other end having an opening facing the outside, avalve switch member 960 which moves forward or backward due to a pressure of carbon dioxide in the valvemain channel 911 to open or close thevalve discharge channel 913, and a valveelastic member 970 which elastically supports thevalve switch member 960. - The
upper case 910 a, the middle case 901 b, and the lower case 901 c may be coupled by screws S. - The low pressure sensor integrated
relief valve 900 may also include aninlet 901 and anoutlet 902 which are connected to theconnection channel 200 a, aspring support portion 951 which supports the pusherelastic member 950, an adjustingscrew 952 for adjusting an elastic force of the pusherelastic member 950, a packingmember 961 provided in thevalve switch member 960 to seal thevalve discharge channel 913, an adjustingscrew 980 for adjusting an elastic force of the valveelastic member 970, and avalve support body 990 coupled to thevalve body portion 910. - As the
outlet 902 is inserted into the inlet of thesolenoid switch valve 202, the low pressure sensor integratedrelief valve 900 may be installed at thesolenoid switch valve 202. - The
micro switch 940 may include anactuator 941 which protrudes to be pressed by thepusher 930, and when theactuator 941 is pressed by thepusher 930, themicro switch 940 may be turned off internally. - When the
actuator 941 is released from the pressure of thepusher 930, theactuator 941 returns to an original state due to an elastic force of an elastic member in themicro switch 940, and when theactuator 941 returns to the original state, themicro switch 940 may be turned on. - However, the above-described operation of the
micro switch 940 is only one example, when thepusher 930 presses theactuator 941, themicro switch 940 may also be turned on, and when theactuator 941 is released from the pressure of thepusher 930, themicro switch 940 may also be provided to be turned off, unlike the present embodiment. In the above-described case, themicro switch 940 has to be provided above thepusher 930 unlike the present embodiment. - Meanwhile, when a pressure in the
connection channel 200 a is transferred to the valvemain channel 911 using the above-described structure, as illustrated inFIG. 14 , and the pressure in theconnection channel 200 a is greater than a predetermined replacement pressure (about 7.3 to 7.7 bar) and smaller than a predetermined pressure limit (about 9.5 to 11.5 bar), thepusher 930 overcomes an elastic force of the pusherelastic member 950, moves in one direction, and presses theactuator 941 of themicro switch 940, and themicro switch 940 is turned off. Thevalve switch member 960 moves in one direction due to an elastic force of the valveelastic member 970, and closes thevalve discharge channel 913. - As illustrated in
FIG. 15 , when the pressure in theconnection channel 200, that is the pressure in theconnection channel 200 a, is greater than the predetermined pressure limit (about 9.5 to 11.5 bar), thevalve switch member 960 overcomes an elastic force of the valveelastic member 970, moves in a direction opposite the one direction, and opens thevalve discharge channel 913. - As illustrated in
FIG. 16 , when a pressure in theconnection channel 200 a is less than the predetermined replacement pressure (about 7.3 to 7.7 bar), thepusher 930 moves in a direction opposite the one direction due to an elastic force of the pusherelastic member 950, and is separated from themicro switch 940, and themicro switch 940 turns on. - When the
micro switch 940 is turned on, themicro switch 940 sends a low pressure signal to thecontroller 310. - As described above, as the low pressure sensor which senses a pressure when a pressure of carbon dioxide is less than the predetermined replacement pressure, and the relief valve which discharges carbon dioxide to the atmosphere when the pressure of the carbon dioxide is greater than the predetermined pressure limit are integrated, components may be simplified and assembly may be easy compared to a structure in which a low pressure sensor and a relief valve are provided separately. In addition, since a space occupied thereby decreases, the utilization of the space may be improved.
-
FIG. 18 is a view illustrating a replacement notifier of a carbon dioxide cylinder of the refrigerator ofFIG. 11 , andFIG. 19 is a control block diagram of the refrigerator ofFIG. 11 . - A control method of the refrigerator according to another embodiment of the present invention will be described with reference to
FIGS. 18 and 19 . - The refrigerator according to another embodiment of the present invention may further include an
input portion 300 through which discharging of carbonated water or purified water is input, adisplay portion 320 which indicates whether carbonated water is generated or not, and acontroller 310 which controls an opening or closing of anexhaust valve 251, asolenoid switch valve 202, a water supply solenoid valve 211, a waterdischarge solenoid valve 221, and an carbonated waterdischarge solenoid valve 231, and an operation of thedisplay portion 320 based on information received from awater level sensor 111, atemperature sensor 112, and theinput portion 300. - The
controller 310 may receive a low pressure signal sent from themicro switch 940 of the low pressure sensor integratedrelief valve 900, and may control an operation of thedisplay portion 320. - The
input portion 300 and thedisplay portion 320 may be provided in anintegrated display unit 330, and thedisplay portion 320 may include anotifier 321 which notifies of the replacement time of thecarbon dioxide cylinder 120. - The low pressure sensor integrated
relief valve 900 may sense a pressure of carbon dioxide in theconnection channel 200 a. - When the sensed pressure is less than a predetermined replacement pressure, the low pressure sensor integrated
relief valve 900 may send the low pressure signal to thecontroller 310, and thecontroller 310 may control thenotifier 321 of thedisplay portion 320 to notify of a replacement time. - When the sensed pressure is greater than a predetermined pressure limit, the low pressure sensor integrated
relief valve 900 is mechanically opened and may discharge carbon dioxide in theconnection channel 200 a to the atmosphere. - Although the scope of the present invention is described with reference to specific embodiments, the scope of the present invention is not limited to the embodiments. Various other embodiments that may be changed or modified by those skilled in the art without departing from the scope and spirit of the present invention defined by the appended claims fall within the scope of the present invention.
Claims (17)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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KR1020130106868A KR101876367B1 (en) | 2013-09-05 | 2013-09-05 | Refrigerator |
KR10-2013-0106868 | 2013-09-05 | ||
PCT/KR2014/007924 WO2015034199A1 (en) | 2013-09-05 | 2014-08-26 | Refrigerator |
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US20160209104A1 true US20160209104A1 (en) | 2016-07-21 |
US10119749B2 US10119749B2 (en) | 2018-11-06 |
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US14/914,997 Expired - Fee Related US10119749B2 (en) | 2013-09-05 | 2014-08-26 | Refrigerator |
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US (1) | US10119749B2 (en) |
EP (1) | EP3043130B1 (en) |
KR (1) | KR101876367B1 (en) |
CN (1) | CN105518400B (en) |
WO (1) | WO2015034199A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US20190016607A1 (en) * | 2017-07-13 | 2019-01-17 | Lg Electronics Inc. | Water purifier |
US20190346201A1 (en) * | 2015-11-30 | 2019-11-14 | Lg Electronics Inc. | Water purifier and control method thereof |
US20190382281A1 (en) * | 2017-07-20 | 2019-12-19 | Lg Electronics Inc. | Water purifier |
WO2023093547A1 (en) * | 2021-11-26 | 2023-06-01 | 青岛海尔电冰箱有限公司 | Mixing assembly applied to sparkling water assembly, and refrigerator having same |
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KR102519055B1 (en) | 2015-11-03 | 2023-04-07 | 삼성전자주식회사 | Apparatus for producing carbonated water, Refrigerator having the same and method for controlling the same |
CN110301820A (en) * | 2018-03-27 | 2019-10-08 | 佛山市顺德区美的饮水机制造有限公司 | Water dispenser and its gas cylinder replacing options and device |
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WO2020017595A1 (en) * | 2018-07-20 | 2020-01-23 | ダイキン工業株式会社 | Storage system |
WO2020223513A1 (en) | 2019-05-02 | 2020-11-05 | Engineered Controls International, Llc | Low-pressure shut-off valve and system |
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- 2014-08-26 EP EP14843060.6A patent/EP3043130B1/en active Active
- 2014-08-26 WO PCT/KR2014/007924 patent/WO2015034199A1/en active Application Filing
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Also Published As
Publication number | Publication date |
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EP3043130B1 (en) | 2018-08-15 |
CN105518400B (en) | 2018-12-04 |
EP3043130A4 (en) | 2017-05-03 |
US10119749B2 (en) | 2018-11-06 |
KR20150028151A (en) | 2015-03-13 |
WO2015034199A1 (en) | 2015-03-12 |
CN105518400A (en) | 2016-04-20 |
EP3043130A1 (en) | 2016-07-13 |
KR101876367B1 (en) | 2018-07-10 |
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